Update publishing instructions

Author: avh4

PUBLISHING.md

@@ -1,7 +1,7 @@
 # How to publish this package
 
 1. Make sure the README is up-to-date for the new version (commit changes if necessary)
-1. make sure tests pass locally `rm -Rf ./node_modules && npm install && npm test`
+1. make sure tests pass locally `rm -Rf ./node_modules && npm ci && npm test`
 1. `npm version <the new version>` (this creates the git tag)
 1. `git push origin v<the new version>`
 1. wait for CI to pass on the tagged version <https://travis-ci.org/avh4/binwrap>